Oblique-incidence ultrasonic flaw detection method for barrel-type forging

An ultrasonic and oblique incident technology, which is applied in the direction of analyzing solids using sound waves/ultrasonic waves/infrasonic waves, can solve problems such as reducing the missed detection rate of ultrasonic flaw detection, and achieve the effects of reducing the missed detection rate of flaw detection defects, broadening the flaw detection range, and combining scientifically and reasonably

Active Publication Date: 2012-08-15
NANJING DEV ADVANCED MFG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to provide an ultrasonic detection method to detect that the ratio of the outer diameter to the inner diameter is greater than or equal to 2 is less than or equal to 4 internal defects of cylindrical forgings, and can better reduce the missed detection rate of ultrasonic flaw detection

Method used

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  • Oblique-incidence ultrasonic flaw detection method for barrel-type forging
  • Oblique-incidence ultrasonic flaw detection method for barrel-type forging
  • Oblique-incidence ultrasonic flaw detection method for barrel-type forging

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Embodiment

[0060] Embodiment (process number A), concrete steps are as follows:

[0061] see Figure 9 As shown, 4130 material, specification: Φ433×Φ113×814mm, that is, the outer diameter is 433mm, the inner diameter is 113mm, and the axial length is 814mm.

[0062] Instrument model: CTS-9009, instrument number: 53831010202

[0063] Probe model: Φ20 6 degrees R250, probe number: E118409

[0064] Test block model: 4130-VR-098070 RR250177 (refraction angle 45 degrees contrast test block, serial number: 113557), 4130-VR-098055 RR250140 (refraction angle 34 degree comparison test block, serial number: 113559), 4130-VR-098037 RR250095 (Contrast test block with an incident angle of 10 degrees, serial number: 113550), 4130-VR-098022 RR250057 (comparative test block with an incident angle of 6 degrees, serial number: 113558)

[0065] Instruments, probes and test blocks are calibrated according to the 80% wave height sensitivity of the artificial V-shaped inner groove.

[0066] The flaw detec...

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Abstract

The invention discloses an oblique-incidence ultrasonic flaw detection method for a barrel-type forging. According to the method, an ultrasonic flaw detection device is used for detecting flaws in the different directions in the barrel-type forging. According to the ultrasonic flaw detection method, a small-angle longitudinal-wave oblique probe with a 6-degree incidence angle, a longitudinal wave reference block with a 6-degree incidence angle, a longitudinal wave reference block with a 10-degree incidence angle, a transverse wave reference block with a 34-degree refraction angle and a transverse wave reference block with a 45-degree refraction angle are combined, a small-angle longitudinal-wave detection method is utilized, and the flaw detection range of the ratio of the outer diameter to the inner diameter of the barrel-type forging is broadened, so that the method can be used for detecting the barrel-type forging with the ratio of the outer diameter to the inner diameter being more than 2 and less than 4. Simultaneously, as the ratio of the inner diameter to the outer diameter of the reference block is scientific and reasonable, the flaw detection loss of the barrel-type forging can be reduced to the lowest, thus being more beneficial to ensuring the inner quality of the barrel-type forging.

Description

technical field [0001] The invention relates to an oblique-incidence ultrasonic flaw detection method for cylindrical forgings, which is applied to the ultrasonic flaw detection of internal radial defects of cylindrical forgings whose ratio of outer diameter to inner diameter is greater than or equal to 2 and less than or equal to 4. The axial length of the cylindrical forging Greater than 50mm. Background technique [0002] For hollow (or cylindrical) forgings with a ratio of outer and inner diameters less than 2 to 1, the flaw detection method adopted internationally is mainly the pure shear wave oblique incidence detection method, but for forgings with a ratio of outer and inner diameters greater than or equal to 2 to 1, there is no oblique incidence. The detection method leads to a large number of missed detection of radial defects. As we all know, the limitation of pure shear wave flaw detection for cylindrical, annular and pipe materials is that the acoustic axis of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 张利陈昌华
Owner NANJING DEV ADVANCED MFG
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